Structure and Magnetic Properties of Two Discrete 3d-4f Heterometallic Complexes

摘要

Two discrete 3d–4f heterometallic complexes [Co~(III)Dy~(III)(CH3CN)_(0.5)(L~1)3(NO3)3](1)and [Ni2 IIDy~(III)(EtOH)(L2)4(NO3)2Cl] ·CH3CN(2)were obtained from the reactions of 8-hydroxyquinoline(HL1)or 2-methyl-8-hydroxyquinoline(HL2)with their corresponding metal salts.Complex 1 presents a dinuclear structure with the Dy(III)and Co(II)ions linked by three phenolic oxygen atoms from three(L~1)~-ligands.Complex 2 presents a triangular trinuclear structure with the two Ni(II)ions and one Dy(III)ion consolidated by one chloride ligand and four phenolic oxygen atoms from four(L2)~-ligands.Their χMT versus T plots show different profiles with obvious ferromagnetic interactions between the metal ions in 2.Both complexes exhibit slow magnetic relaxation behaviours,but with obvious different features.It revealed a cooperatively regulating effect of ligand and transition metal ions on the structures and magnetic properties.